Multiple choice

A student isolates the dsDNA from a novel virus that it is subjected to genomic analysis. It reveals that the molecule contains 14% thymine. What would you predict for the %C (cytosine)?

  1. 72%

  2. 28%

  3. 36%

  4. 14%
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

In double-stranded DNA, adenine pairs with thymine (A=T) and guanine pairs with cytosine (G=C). If thymine is 14%, adenine is also 14% (total A+T=28%). Therefore G+C must be 72%, so cytosine alone is 36%.

Keep practicing — related questions